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ALTERNATIVE HEATING & COOLING Ltd. provide a wide range of top quality heat pumps for the domestic and commercial markets. We cater for all varieties of Heating & Cooling applications with over 1200 heat pump installations nationwide.
Who We Are

Alternative Heating & Cooling Ltd was founded by Mike Cotter and Brendan Harte in 2001. Since then the team has grown in numbers, our qualifications include:

  • Marine Engineer (Steam and Motor)
  • Qualified Plumbers through FAS training.
  • Diploma in Instrumentation Physics.
  • Computer Engineering
  • Sustainable Energy Engineering
  • All Relevant Safety Courses
  • Electrofusion Welding Certification
  • GeoExchange Designer Course
Alternative Heating & Cooling ltd  provide a wide variety of top quality heap pumps for the domestic and commercial markets, catering for all varieties of heating and cooling applications with over 1300 heat pump installations nationwide. The majority of these are ground source however in recent years air source systems have become popular due to major improvement in air source technology.
Our Aim
To put AHAC on the map as a leading supplier of Renewable Energy Heating and Cooling solutions and systems while continuing to sustain quality and perfection.
Here at AHAC we concentrate on the following approach:
  • Provide excellence to our customers from the early stage of projects to our after sales service.
  • To ensure quality is maintained throughout all procedures
  • To employ, train and retain the best people in the industry.
  • To be flexible and responsible in meeting our customers expectations.
  • Be a leader in innovation and new renewable energy technologies.
  • Possess an in-depth product knowledge.
Customers Vs Products
With a vast amount of alternative energies and complex systems available, it is difficult to know which is the best solution for you.Here at AHAC we can advise you on the best and most suitable technology to meet your needs. We work with you, the customer, to provide you with a system that will achieve the highest efficiency within your budget, while also providing comfort 365 days of the year to suit your lifestyle.
Protecting the Environment
Renewable energy and sustainable development has moved to become a constant factor in every persons lifestyle, it is in this way we can protect the environment that we live in. The use of precious non-renewable resources is becoming a challenge for us all and any investment towards sustainable development will help in protecting the environment while in turn saving you money on energy bills.

 

 


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What are Heat Pumps ?

Heat pumps generate their heat by utilising the heat that is contained within the ground and air all around us. The heat pump has the ability to extract heat from one environment and discharge it into another and do the same with cooling. A heat pump contains three parts, the energy collector which would be located in the medium to absorb the heat, the fridge compressor itself and the distribution system.

How a Heat Pump works

Domestic Fridge

The heat pump works on the same characteristics as a standard domestic fridge but in reverse, instead of cooling, it heats. Heating and cooling are achieved by moving a refrigerant through various indoor and outdoor coils and components. A compressor, condenser, expansion valve and evaporator are used to change the state of refrigerant from a liquid to hot gas and from a gas to cold liquid.

 

 

 

 

 

Main Stages

  1. The refrigerant (liquid state) passes through the outdoor evaporator coils at a low temperature.
  2. The water/antifreeze from the ground loop enters the unit and heat is transferred from this water/antifreeze to the refrigerant. The refrigerant begins to boil and changes to a vapour.
  3. The vapour is pressurised by the compressor where the temperature is increased to over 100 degrees.
  4. The vapour then enters the condenser heat exchanger and the heat is given up to the coils. At this point, the heat is transferred to the buildings heating, and hot water systems. As it passes through the coils, it cools and turns back into a liquid.
  5. The refrigerant which is now cooled liquid at high pressure passes through an expansion valve, which reduces the pressure so that the liquid can re-enter the evaporator and begin the cycle again.

 

Read More on the Efficiency of Heat Pumps.....

Heat pump efficiency (COP) is obtained by comparing how much energy it consumes in order to complete the heating and cooling cycle. Coefficient of performance (COP) defined as: “The ratio of heat delivered by the heat pump and the electricity supplied to the compressor”

(COP = Kilowatts Delivered) eg. 7.5kw (Output) ÷ 1.5kw (Electrical Input) = 5 COP

Electricity is needed to drive the heat pump, but for every unit of electricity used, it will generate 3 to 5 units of useful heat. The efficiency of a heat pump will depend mainly on the temperature of its energy source and the temperature at which the heat generated is needed. Basically, the higher the temperature of the heat source is and the lower the temperature of the useful heat is, the more efficient the heat pump will be. A Ground Source heat pump using the soil as a heat source (constant temp of 8°C to 12°C) and floor or wall heating (water temp of 35°C to 55°C) is one of the best combinations, with an efficiency in excess of 450%, compared to an oil or gas boiler with an efficiency of 70 – 85%.


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